Pumping system



Feb. 14, 1939. H 3 DAVlDSON 2,146,798

Filed Dec. 2, 1936 Patented Feb. 14 1939 UNITED STATES PTENT OFFICE PUMPING SYSTEM Harold B. Davidson, Louisvill Ky. Application December 2, 1936, Serial No. 113,913

4 Claims.

This invention relates to a pumping equipment for drawing water from a well tube supplied by water flowing into the tube from contiguous subterranean areas.

5 Many wells equipped with high capacity centrifugal pumps of the type shown in the drawing become impaired after operation, due to an inadequate supply of water entering the tube, which after a rest period becomes restored only to again prove inadequate for the planned capacity. Coincident with this development the static water level has a draw down to the pumping level due to an inadequate flow of water into the tube. Such a failure frequently necessitates additional pumping equipment which incidentally results in embarrassment for the sales engineers, who assured the purchasers of certain results, which in turn were based on tables of proven capacities for the selected pump.

20 In wells of the type under consideration which periodically develop deficiencies there is generally an adequate potential'supply of water in the contiguous subterranean areas, however its flow to the tube is insufficient, consequently an 25 object of this invention is to provide means and a method of automatic operation, which will enable the pumping equipment to deliver the calculated performance by providing means to expedite percolation from subterranean areas, thereby causing more water to flow into the well tube than without the use of this invention.

The main object of this invention is to provide additional simple low priced apparatusfor a modern pumping equipment, especially of the 35 deep well centrifugal type, in order that an increased quantity of water can be taken from the well without making any alteration in the pumping equipment or materially departing from the normal operation of same.

4 With the above and other objects in view, as

will hereinafter appear, my invention comprises the features of construction and operation set forth in the following specification and illustrated in the accompanying drawing. In such drawing, annexed hereto and forming a part of this specification, I have shown certain specific embodiments of my invention, but it will be understood that the invention, can be otherwise embodied, and that the drawing is not to be 50 construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

The drawing is a vertical elevation of an installed equipment showing my improvements 55 wherein the foundation tube and a portion of the other equipment is shown in cross section and the remainder of the figure shown in full lines.

The figure shown in the accompanying drawing is illustrative of a vertically disposed motor 5 5 mounted on foundation 6 and over well tube or casing I, in which is disposed a pump or rotor housing 8, sometimes referred to herein as pump tube, The latter serves as the discharge pipe and is provided with the conventional shaft 10 and impellers, constituting a centrifugal pump, all arranged and coordinated for elevating and forcibly delivering water from delivery duct '9.

The well tube is a closed chamber since its top end is hermetically sealed by a plug or collar 15 I0, consequently a relatively high vacuum can be drawn and sustained inside of the tube durin the, pumping periods. To accomplish this, pipe line H connects the tube with a hydraulic exhauster l2. The latter is activated by diverting a portion of the water being delivered through duct 9 by means of pipe l3 which delivers the water, under high pressure, through nozzle M to a conventional venturi, which in turn produces an eifective vacuum within the well tube, as indicated. The water used for this purpose passes through auxiliary outlet pipe l5. It will thus be perceived that incident to the operation-of the pump a partial vacuum will be maintained within the well tube and thereby assist the pump to sustain delivery of water through decreasing the draw down range of the water level within the well tube.

The well tube is indicated as having an imperforate wall with the lower end open to admit water from the immediately contiguous area. A well tube having apertures in selected sections can be substituted or included according to judgment. It will also be obvious that other changes,

such as the employment of a reciprocating type of pump, can be made without departing from the spirit of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. An apparatus for elevating liquids from a lower level to a higher level, comprising a casing in which is disposed a pump tube; a pumping device communicating with said tube; a delivery duct leading from said pumping device; said casing being sealed at its upper end to form a chamher therein closed against ingress of the atmosphere; and means activated by said device to establish and maintain a partial vacuum in said chamber.

2. An apparatus for elevating liquids from a lower level to a higher level, comprising a casing in which is disposed a pump tube; a pumping device communicating with said tube; a delivery duct leading from said pumping device; said casing being sealed at its upper end to form a chamber therein closed against ingress of the atmosphere; and means to utilize a portion of the water pumped by said pumping device to establish and maintain a partial vacuum in said chamber.

3. An apparatus for elevating liquids from a lower level to a higher level, comprising a casing in which is disposed a pump tube; a pumping device communicating with said tube; a delivery duct leading from said pumping device; said casing being sealed at its upper end to form a chamber therein closed against ingress of the atmosphere; and means to utilize water pumped by said pumping device to establish and maintain a. partial vacuum in said chamber.

4. An apparatus for elevating liquids from a lower level to a higher level, comprising a casing in which is disposed a pump tube; a pumping device communicating with said tube; a delivery duct leading from said pumping device; said casing being sealed at its upper end to form a chamber therein closed against ingress of the atmosphere; and an auxiliary outlet pipe connected to said delivery duct, said outlet pipe having an exhauster interposed therein, said exhauster being connected to said chamber by a pipe whereby a partial vacuum is effected in said chamber.

HAROLD B. DAVIDSON. 

